EP3556919A1 - Armsystem einer vorrichtung zum automatischen verbinden und verfahren dafür - Google Patents

Armsystem einer vorrichtung zum automatischen verbinden und verfahren dafür Download PDF

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Publication number
EP3556919A1
EP3556919A1 EP19167723.6A EP19167723A EP3556919A1 EP 3556919 A1 EP3556919 A1 EP 3556919A1 EP 19167723 A EP19167723 A EP 19167723A EP 3556919 A1 EP3556919 A1 EP 3556919A1
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EP
European Patent Office
Prior art keywords
piecing
arm assembly
arm
yarn
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19167723.6A
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English (en)
French (fr)
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EP3556919B1 (de
Inventor
Jeganathan Pasupathy
Masthigoundenpathy Giriraj Deepan Marudachalam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lakshmi Machine Works Ltd
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Lakshmi Machine Works Ltd
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Publication date
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Publication of EP3556919A1 publication Critical patent/EP3556919A1/de
Application granted granted Critical
Publication of EP3556919B1 publication Critical patent/EP3556919B1/de
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/013—Carriages travelling along the machines

Definitions

  • the present disclosure relates in general to textile spinning machines. Particularly but not exclusively, the present disclosure relates to an automatic yarn piecing apparatus. Further, embodiments of the present disclosure relates to piecing arm assembly for the automatic yarn piecing apparatus.
  • ring spinning machines are used to produce continuous lengths of yarn.
  • Textile roving materials produced from roving frame machines are usually fed into the ring spinning machines.
  • the roving material is first drafted and twisted and then wound on a package so called cop or yarn cop.
  • yarn breakage in the said ring spinning machines is a common and frequent problem that requires continuous attention of the work force.
  • the yarn breakage remains a major disadvantage in ring spinning machines.
  • large number of workers used to continuously monitor the ring spinning machines throughout the length of the machine frame which is normally more than 1200 spindles.
  • the broken yarns have to be pieced manually and the yarn spinning sequence has to be restarted after yarn breakage in order to avoid wastage of yarn. This becomes a monotonous task and continuous monitoring of the ring spinning machines drains stamina and health of the workers due to continuous walking along the long ring spinning frames to manually piece the broken yarn ends throughout the day.
  • automatic piecing devices are developed as an improvement over the conventional method of manual piecing.
  • the automatic piecing devices involves a robot or a worker in a piecing vehicle or piecing device with built-in drive units and supportive functional units.
  • These automatic piecing devices require additional effort to advance towards the ring spinning machine for piecing operation and to return back after completion of the piecing operation.
  • the conventional automatic piecing devices may practically fail to properly catch and hold the joining ends of the yarn during piecing. This is one of the major drawbacks of the conventional automatic piecing devices that may lead to improper automatic piecing operation.
  • the present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the conventional arts.
  • a piecing arm assembly for an automatic piecing apparatus.
  • the piecing arm assembly comprises of at least one arm that is configured to displace between a first position and a second position in the automatic piecing apparatus.
  • a plurality of guide fingers are provided which are supported by the at least one arm of the piecing arm assembly.
  • the plurality of guide fingers are configured to locate the piecing arm assembly with the delivery drafting roller.
  • at least one roller is rotatably positioned on the plurality of guide fingers, wherein the at least one roller is configured to contact with the delivery drafting roller in the second position.
  • the piecing arm assembly also includes a movable plate that is positioned on a support member extending from the at least one arm.
  • a movable plate is provided with a guide slot.
  • the said movable plate with guide slot is connected to the support member extending from the at least one arm, said guide slot is configured to displace linearly in a horizontal direction to align the tail yarn for piecing.
  • the at least one arm is pivotably connected to a base unit of the piecing arm assembly.
  • the at least one arm is pivotably connected to a base unit of the automatic piecing apparatus.
  • the piecing arm assembly comprises an arm plate which is configured to house the at least one roller and the plurality of guide fingers.
  • the movable plate is defined with a guide slot to receive and align the tail yarn.
  • the movable plate comprises of a guiding surface that co-operates with the guide slot for sliding the tail yarn into the guide slot for piecing.
  • the piecing arm assembly comprises of a first actuator that is connected to the movable plate for actuating the movable plate.
  • the at least one arm in the second position makes the at least one roller contact with the delivery drafting roller of the textile spinning machine for piecing the tail yarn and a broken yarn at a position proximal to the nip point of said delivery drafting roller.
  • the piecing arm assembly comprises of a cutter unit that is connected to the movable plate, wherein the cutter unit is connected to a second actuator to snip excess tail yarn after piecing.
  • a method for piecing a yarn by a piecing arm assembly in an automatic piecing apparatus comprises of displacing the at least one arm from the first position to the second position for piecing the tail yarn and a broken yarn proximal to the nip point of a delivery drafting roller. Further, drawing the tail yarn towards the piecing arm assembly such that, a plurality of guide fingers connected to the at least one arm locates the piecing arm assembly with the delivery drafting roller.
  • the method also involves at least one roller positioned on the plurality of guide fingers contacts with the delivery drafting roller.
  • the method involves operating a guide slot on the support member that extends from the at least one arm to align the tail yarn for piecing.
  • a piecing arm assembly is provided in the automatic piecing apparatus, wherein the piecing arm assembly comprising of at least one arm configured to displace from a first position to a second position for piecing the tail yarn and the broken yarn proximal to the nip point of delivery drafting roller.
  • the plurality of guide fingers are provided that are supported by the at least one arm, said plurality of guide fingers are configured to locate the piecing arm assembly with the delivery drafting roller.
  • the at least one roller is rotatably positioned on the plurality of guide fingers to contact the delivery drafting roller in the second position.
  • a movable plate is positioned on the support member that extends from the at least one arm, said movable plate is provided with a guide slot. The guide slot is configured to displace linearly in a horizontal direction.
  • a cutter unit is connected to the movable plate, wherein the cutter unit snips the excess tail yarn after piecing.
  • the suction unit of the automatic piecing apparatus comprises of a first suction pipe to draw the tail yarn.
  • the suction unit of textile spinning machine comprises a second suction pipe at each spindle positions connected to a longitudinal suction duct throughout the spinning machine to draw the broken yarn.
  • Embodiments of the present disclosure relates in general to textile spinning machines. More particularly, the present disclosure relates to a textile spinning machine configured with an automatic piecing apparatus.
  • the automatic piecing apparatus comprises of a base unit, a support frame, wherein the base unit is provided with an advancing mechanism.
  • the apparatus also includes a piecing arm assembly mounted to the base unit.
  • the base unit may be configured with a first suction pipe to draw a tail yarn from a yarn cop of the textile spinning machine for piecing.
  • the piecing arm assembly comprises of at least one roller to aid in the piecing operation and advancing the pieced yarn downstream after piecing and at least one guide finger to locate the piecing arm assembly with the delivery drafting roller.
  • An arm plate is configured with the piecing arm assembly, wherein the plurality of guide fingers and the at least one roller is mounted on the arm plate.
  • a movable plate is configured with the piecing arm assembly with a guiding surface and a guide slot on the movable plate so as to guide the tail yarn into the guide slot for effectively piecing the broken yarn.
  • a cutter assembly with plurality of cutter elements is mounted on the movable plate to snip the excess yarn that is left after the piecing operation is completed.
  • the tail yarn is carried up to the engaging position by the piecing arm assembly where the tail yarn is made to come in contact with the broken yarn. The tail yarn and the broken yarn catch each other, thus resulting in a piecing operation.
  • the piecing arm assembly may be retracted back to its retracted position and the automatic piecing apparatus moves to the next location.
  • FIG 1 is an exemplary embodiment of the disclosure which illustrates a perspective view of a textile spinning machine (1).
  • the textile spinning machine (1) comprises of at least one spinning station (2), wherein the at least one spinning station (2) provides a continuous roving (3) for drafting.
  • a drafting unit (4) is fixed to the textile spinning machine (1), wherein the drafting process is carried out by the aid of the delivery drafting rollers (5) configured within the drafting unit (4).
  • the continuous roving (3) that is fed into the drafting unit (4) is drafted and subsequently twisted and then wound on a bobbin so as to form a yarn cop (6).
  • a tail yarn (12) that is broken away from the continuous roving (3) is attached to the yarn cop (6). In other words, the broken end of the tail yarn (12) is entangled in the yarn cop (6).
  • an automatic piecing apparatus (7) may be employed in the spinning area [best shown in FIG. 2 ].
  • the automatic piecing apparatus (7) comprises of a first suction pipe (14) (refer Figure 4 ).
  • the first suction pipe (14) is used to draw the tail yarn (12) from the yarn cop (6) wherein the tail yarn (12) is attached to the yarn cop (6).
  • the first suction pipe (14) generates a negative pressure due to which a suction force is created.
  • the suction force created in the first suction pipe (14) draws the tail yarn (12) from the yarn cop (6) into the first suction pipe (14).
  • the automatic piecing apparatus (7) may be located adjacent to the textile spinning machine (1).
  • the automatic piecing apparatus (7) displaces along the textile spinning machine (1) in order to stop at the required yarn cop (6) for piecing the tail yarn (12) with the broken yarn (10).
  • FIG 3 illustrates a schematic view of the piecing arm assembly (15) of the automatic piecing apparatus (7).
  • the piecing arm assembly (15) comprises of at least one arm (16), wherein the at least one arm (16) is connected to the base unit (9) [shown in figure 2 ].
  • the at least one arm (16) is capable of pivoting from a first position to a second position during the operation of the automatic piecing apparatus (7).
  • An arm plate (17) is connected to the at least one arm (16) to facilitate mounting of the plurality of guide fingers (19) and at least one roller (25) of the piecing arm assembly (15).
  • the at least one roller (25) is fixed to the piecing arm assembly (15) wherein, the at least one roller (25) is configured to contact with the delivery drafting roller (5) in the second position.
  • the tail yarn (12) contacts the delivery drafting roller (5) at a nip point.
  • the nip point is the location where the delivery drafting rollers are capable of coming in contact with the at least one roller (25).
  • the at least one arm (16) is positioned proximal to the nip point at the second position.
  • the piecing arm assembly (15) comprises of the plurality of guide fingers (19) fixed to the arm plate (17). At least one roller (25) is configured on the plurality of guide fingers (19). As the piecing arm assembly (15) traverses from the first position to the second position, the tail yarn (12) held in the suction pipe (14) is positioned on the at least one roller (25).
  • the plurality of guide fingers (19) may be configured to locate the piecing arm assembly properly with the delivery drafting roller (5).
  • the plurality of guide fingers (19) and the at least one roller (25) help in positioning the tail yarn (12) with the delivery drafting roller (5) to carry out the piecing operation.
  • the piecing arm assembly (15) comprises of a movable plate (18) mounted on a support member extending from the at least one arm (16).
  • the movable plate (18) is provided with a guide slot (20) configured to displace linearly in a horizontal direction.
  • a first actuator (22) is connected to the movable plate (18), to displace the movable plate (18) linearly in a horizontal direction.
  • the guiding surface (21) co-operating with the guide slot (20) allows the tail yarn (12) to slide into the guide slot (20) while the piecing arm assembly (15) moves for piecing.
  • the first actuator (22) may be connected to one side of the movable plate (18) and a second actuator (23) may be connected on the movable plate (18) for actuating a cutter unit (13) (shown in figure 7 ).
  • the second actuator (23) is configured to actuate the cutter unit (13) to snip the excess yarn after the piecing operation of the tail yarn (12) is completed.
  • the at least one roller (25) comes in contact with the delivery drafting rollers (5) provided on the drafting unit (4) of the textile spinning machine (1).
  • the tail yarn (12) which is already held in the first suction pipe (14) is carried by the piecing arm assembly (15) towards the delivery drafting rollers (5).
  • the piecing arm assembly (15) reaches the second position and the tail yarn (12) comes in contact with the delivery drafting roller (5).
  • the tail yarn (12) carried by the piecing arm assembly (15) rests on the at least one roller (25), wherein the at least one roller (25) is configured to rotate freely.
  • the at least one roller (25) comes in contact with the delivery drafting rollers (5), wherein frictional contact between the at least one roller (25) and the delivery drafting rollers (5), drives the at least one roller (25). More particularly, the at least one roller (25) advances the tail yarn (12) towards the delivery drafting rollers (5) such that, the tail yarn (12) and the broken yarn (10) coming out of the delivery drafting rollers (5) catch or contact each other to undergo the piecing operation. The rotation of the roller (25) together with delivery drafting rollers (5) advances the pieced yarn downstream after piecing.
  • the automatic piecing apparatus (7) comes to the required position i.e. adjacent to the textile spinning machine (1) when the continuous roving (3) breaks.
  • the automatic piecing apparatus (7) comprises of a base unit (9) and a support frame (8) that supports the base unit (9). Further, the yarn cop (6) is stopped from rotating so that the yarn extending from the yarn cop (6) may be drawn into the first suction pipe (14) to complete the piecing operation.
  • the textile spinning machine (1) is further configured with a second suction pipe (11).
  • This second suction pipe (11) is mounted on the textile spinning machine (1) beneath the delivery drafting rollers (5).
  • the broken yarn (10) that is extending from the delivery drafting rollers (5) gets drawn into the second suction pipe (11).
  • the drawing of the broken yarn (10) into the second suction pipe (11) is achieved by a suction force created in the second suction pipe (11) on the textile spinning machine (1).
  • Figure 4 illustrates the automatic piecing apparatus (7) positioned adjacent to the textile spinning machine (1) to piece the tail yarn (12) and the broken yarn (10).
  • the piecing arm assembly (15) as disclosed in the figure is in the first position.
  • the first suction pipe (14) is operated in order to draw or suck the tail yarn (12) into the first suction pipe (14).
  • the piecing arm assembly (15) of the automatic piecing apparatus (7) pivots to its second position. Due to the displacement or pivoting action of the piecing arm assembly (15) from the first position to the second position, the tail yarn (12) is directed towards the drafting unit (4). Also, movement of the piecing arm assembly (15) aids in carrying out the piecing operation.
  • Figure 5 illustrates the tail yarn (12) drawn into the first suction pipe (14), wherein the first suction pipe (14) firmly holds the tail yarn (12).
  • the piecing arm assembly (15) of the automatic piecing apparatus (7) is now displaced to the second position. At this position the tail yarn (12) held by the first suction pipe (14) is carried forward towards the delivery drafting roller (5) of the drafting unit (4). This ensures that the tail yarn (12) comes in contact with the delivery drafting roller (5), wherein, the at least one roller (25) mounted to the piecing arm assembly (15) contacts the delivery drafting roller (5). Due to the frictional contact between the delivery drafting roller (5) and the at least one roller (25) of the piecing arm assembly (15), the tail yarn (12) tends to piece with the broken yarn (10) and advances downstream after piecing.
  • Figure 6a illustrates rear side view of the piecing arm assembly (15), wherein the movable plate (18) is at the home position, when the first actuator (22) is in an extended position.
  • the movable plate (18) comprises of a guide slot (20) wherein, the guide slot (20) aids in positioning the tail yarn (12) for piecing as the displacement of the piecing arm assembly (15) takes place from the first position to the second position, to piece the tail yarn (12) with the broken yarn (10).
  • a guiding surface (21) in the form of slope is provisioned on the movable plate (18), wherein guiding surface (21) aids in aligning the tail yarn (12) within the guide slot (20) defined in the movable plate (18).
  • the tail yarn (12) is held by the first suction pipe (14) which comes in contact with the guiding surface (21) of the movable plate (18) when the piecing arm assembly (15) moves to the second position.
  • the guiding surface (21) slides the tail yarn (12) into the guide slot (20) thereby aligning the tail yarn (12) in the required position.
  • Figure 6b illustrates the second position of the movable plate (18) when the first actuator (22) is in a retracted position.
  • the tail yarn (12) in the guide slot (20) contacts the delivery drafting roller (5) but may not merge with the broken yarn (10) at the nip point of delivery drafting roller (5) and piecing may not happen.
  • the first actuator (22) is actuated to the retracted position so that the movable plate (18) displaces at a distance 'Y'.
  • the said linear traversing (Y) aids in merging and piecing the tail yarn (12).
  • the movement of the movable plate (18) prevents the tail yarn (12) and the broken yarn (10) from being misaligned.
  • This configuration of the piecing arm assembly (15) aids in positioning of the tail yarn (12) for piecing the tail yarn (12) and the broken yarn (10) together.
  • Figure 7 illustrates a schematic view of the piecing arm assembly (15) depicting the cutter unit (13).
  • the cutter unit (13) is configured to snip the excess yarn
  • the cutter unit (13) comprises of a first fixed cutting element (26) and a second movable cutting element (27).
  • the first fixed cutting element (26) is fixed to the movable plate (18) and the second movable cutting element (27) is pivotably connected to the movable plate (18) at a pivot point (28).
  • a connecting link (24) is used to connect the second movable cutting element (27) with the second actuator (23).
  • the pivot point (28) facilitates a scissor like movement of the second movable cutting element (27).
  • the displacement required by the second movable cutting element (27) is provided by the second actuator (23).
  • the cutting elements (26, 27) of the cutter unit (13) have a sharp edge to cut the excess yarn.
  • Figures 8a and 8b illustrates the home position and the cutting position of the cutter unit (13).
  • the cutter unit (13) may be at the home position, wherein the second actuator (23) is at a retracted position.
  • the cutter elements (26, 27) may be defined to have sufficient gap for allowing the tail yarn (12) to be positioned in the guide slot (20).
  • the cutter unit (13) may be actuated based on the requirement to snip the excess yarn left out after the piecing operation.
  • the second actuator (23) is actuated to displace from the retracted position to an extended position. The displacement of the second actuator (23) results in displacing the connecting link (24) of the cutter unit (13).
  • the connecting link (24) is directly connected to the second movable cutting element (27), it displaces the second movable cutting element (27).
  • the second movable cutting element (27) is pivotably connected to the movable plate (18), hence the displacement given to the second movable cutting element (27) gets converted into pivoting movement of the second movable cutting element (27). This pivoting movement results in a snipping action created between the cutting elements (26, 27).
  • Figure 9 illustrates the automatic piecing apparatus (7) after completion of the piecing operation.
  • the tail yarn (12) extending from the yarn cop (6) has been pieced with the broken yarn (10) extending from the delivery drafting rollers (5).
  • the piecing arm assembly (15) of the automatic piecing apparatus (7) is returned to the first position from the second position.
  • the automatic piecing apparatus (7) is then scheduled for the next piecing operation in a different position wherever the piecing operation is required.
  • the normal operation of textile spinning machine continues with the continuous roving (3) delivering out from the delivery drafting rollers (5) for subsequent twisting and winding in the yarn cop (6).
  • first suction pipe (14) and the second suction pipe (11) may be a tube, pipe, conduit, and the like.
  • the suction force created in the first suction pipe (14) is capable of holding the tail yarn (12) drawn into it until the piecing operation is completed.
  • the textile spinning machine (1) may be one of textile ring spinning machine, compact yarn spinning machine, and the like.
  • the guide slot (20) may be of U-shape, C-shape, V shape or any other geometrical shape as required.
  • the first actuator (22) and the second actuator (23) are one of pneumatic devices or hydraulic devices or linear actuators or any type of actuators.
  • the first actuator (22) is a linear actuator with a drive unit.
  • an advancing mechanism is provided for moving the automatic piecing apparatus (7) towards or away from the textile spinning machine (1).
  • the automatic piecing apparatus (7) comprises of a brake actuating mechanism.
  • the brake actuating mechanism applies a stopping force to the running spindle of the rotating yarn cop (6).
  • the automatic piecing apparatus (7) provides improved and accurate piecing operation by moving the tail yarn (12) in a linear horizontal direction to align it with the broken yarn (10).
  • the tail yarn (12) and the broken yarn (10) are drawn into the first suction pipe (14) and the second suction pipe (11) respectively to hold the tail yarn (12) and the broken yarn (10) while the piecing operation takes place.
  • the broken yarn (10) is one of delivery fiber, delivery roving and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP19167723.6A 2018-04-19 2019-04-08 Spleissvorrichtung mit einem arm für eine automatische spleissapparatur und spleissverfahren Active EP3556919B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN201841014825 2018-04-19

Publications (2)

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EP3556919A1 true EP3556919A1 (de) 2019-10-23
EP3556919B1 EP3556919B1 (de) 2024-08-21

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CN (1) CN110387616B (de)

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EP3748054B1 (de) * 2019-06-06 2023-02-22 Lakshmi Machine Works Ltd. Ringspinnmaschine mit einer automatischen fadenanspinnanordnung und einer kippvorrichtung für eine fadenführung für die automatische fadenanspinnanordnung
CN113293471A (zh) * 2020-02-21 2021-08-24 拉克施米机械制造有限公司 自动纱线捻接单元
CN112125060A (zh) * 2020-09-28 2020-12-25 安徽日发纺织机械有限公司 一种带有单锭吸嘴的捻接小车及其捻接方法
CN116623322A (zh) * 2023-05-24 2023-08-22 常州市宏发纵横新材料科技股份有限公司 一种纤维往复剪切装置
CN116676693A (zh) * 2023-06-14 2023-09-01 常州市宏发纵横新材料科技股份有限公司 一种纤维空捻装置及拼接方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193305A (en) * 1967-06-21 1970-05-28 Altaisky Politeknichesky Inst Device for the Elimination of Yarn Breakages on Spinning Frames and on Spinning and Twisting Frames
JPS5296241A (en) * 1976-02-06 1977-08-12 Toyo Boseki Piecing device for spinning frames
DE3015839A1 (de) * 1980-04-24 1981-10-29 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Ansetzvorrichtung zum beheben von fadenbruechen an einer ringspinnmaschine
DE3728333A1 (de) * 1987-08-25 1989-03-09 Zinser Textilmaschinen Gmbh Vorrichtung zum bewegen eines fadenfuehrers beim ansetzen eines fadens durch eine selbsttaetige fadenansetzvorrichtung an einer ringspinnmaschine
JPH07278976A (ja) * 1994-04-08 1995-10-24 Ishikawa Seisakusho Ltd 紡機の自動糸継ぎ機における糸継ぎ方法およびその装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193305A (en) * 1967-06-21 1970-05-28 Altaisky Politeknichesky Inst Device for the Elimination of Yarn Breakages on Spinning Frames and on Spinning and Twisting Frames
JPS5296241A (en) * 1976-02-06 1977-08-12 Toyo Boseki Piecing device for spinning frames
DE3015839A1 (de) * 1980-04-24 1981-10-29 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Ansetzvorrichtung zum beheben von fadenbruechen an einer ringspinnmaschine
DE3728333A1 (de) * 1987-08-25 1989-03-09 Zinser Textilmaschinen Gmbh Vorrichtung zum bewegen eines fadenfuehrers beim ansetzen eines fadens durch eine selbsttaetige fadenansetzvorrichtung an einer ringspinnmaschine
JPH07278976A (ja) * 1994-04-08 1995-10-24 Ishikawa Seisakusho Ltd 紡機の自動糸継ぎ機における糸継ぎ方法およびその装置

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CN110387616B (zh) 2022-03-29
EP3556919B1 (de) 2024-08-21
CN110387616A (zh) 2019-10-29

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